The figure shows how to couple two TTL circuits using an optical coupler to obtain isolation. The circuit is shown in the August 1992 issue of Radio Electronics magazine.
This simple lie detector was found in Popular Electronics. Transistors are commonly used. The...
Found in the 2005 Linear Technology Application Manual, this circuit controls the torque of a...
This circuit was found in the Italian magazine Radio Elettronica from September 1977. It consists of a...